Movement mechanism for pipeline undermining machine

FIELD: equipment for pipeline laying and repair.

SUBSTANCE: mechanism comprises several identical carriages with outer and inner frames. Outer frames are provided with longitudinal guiding paths. Inner frames have guiding running wheels. Outer frames are installed on running wheels by longitudinal guiding paths. Each frame is provided with clip-on chucks connected one to another by hydraulic cylinders located in corresponding carriages. Carriages have support means resting upon pipeline. Support means are installed on inner frames. One carriage is fixedly connected with neighboring carriage through mounting panel used for attached implements mounting.

EFFECT: simplified structure and increased productivity.

2 dwg

 

The invention relates to mechanisms for construction and repair of pipelines to transport mechanisms and can be used as the underlying transport means for hinged Protopopova, treatment, isolation of equipment during construction and repair of pipelines, as well as in all cases when it is necessary to carry out the transportation of goods using the pipeline as a monorail.

Known transport device [1] (see A.S. No. 480885, publ. BI No. 30 (1975), this device for movement along the outer surface of the pipeline is a transport system of the walking type, made in the form of United power cylinder two frames on the driving wheels, each of which is fixed mating with the base of the Executive body, which is made in the form of tick covering pipe clamps and associated with the hydraulic cylinders move the unit by alternately fixing frames on the pipeline and including a traction cylinder.

A disadvantage of this device is that to effect the movement of this device requires the presence of two pairs of cylinders capture and cylinder movement, as well as the need for the cycle to implement the six cycles on techsolutions of the valve, it is to be implemented it is necessary in a specific sequence, and that is a great visual and mental stress.

Work:

1) Switching valve “1” on the capture of the first pipeline ticks.

2) switching valve “2” to control the release of the pipeline from capture second ticks.

3) Switching valve “3” for cylinder movement. Internal driving the trolley moves along the guides of the outer trolley.

4) Turns on the spool “2” to capture the second pipeline ticks.

5) Enables the valve to “1” to release the pipe from the first capture ticks.

6) is Activated valve “3” for cylinder movement. Outer trolley with hinged at her working body is moved in the operating mode.

In this device there is no relationship efforts gripping tongs of the pipeline with a work force of traction cylinder. The force of the compression pipeline is constantly the maximum configured to overcome possible resistance to movement of the device. For example, podkapotnoj leveler device configured to be able to design primers great strength, although in practice they are found in small areas. This mode is dangerous for pipelines, such as pipelines, which is carried out in a continuous mode per the pitching of oil under high pressure. Such an attitude of the device also leads to increased energy consumption for the operation of the machine.

A device for movement along the outer surface of the pipeline [2] (see A.S. No. 513206, publ. in BI No. 17, 05.05.1976, the additional invention to A.S. No. 480885), in this device design introduced an additional trolley and cylinder movement, which allowed increasing the speed of movement of the device in a loop of the working movement.

Disadvantages of the device management A.S. No. 480885 and device A.S. No. 513206 not resolved.

The closest analogue, selected as a prototype, is the mechanism of movement of the machine for digging pipelines [3] (see patent RU No. 2084589 C1, E 02 F 5/10, F 16 L 1/00, publ. In BI No. 20, 20.07.1997), made in the form of United power cylinder trucks on the driving wheels on the frame each of which is fixed mating with the base body, which is made in the form of tick covering piping, clamps, and the frames themselves are flat rectangular contours, and the first frame of the trucks are made with longitudinal guides, and the second frame of the second cart is enclosed inside the first frame with a bearing on its guides by means of the traveling wheels of the truck, the actuator tick grabs and drive axial movement of trucks made combined in one jet, the x power cylinder, each of the cylinders connected to the respective pair of tick grabs trucks through a pair of thrust opposite the connecting forms.

The disadvantage of the mechanism of movement of the machine for digging pipelines [3] is a low technical ability to develop greater traction energy in the development of permafrost.

It is known that the development of a strong soil, such as frozen, has specific requirements for work equipment and particularly to traction mechanisms. The development of permafrost or similar feasible only those mechanisms that have the technical capability to develop greater traction energy.

Currently known mechanisms of movement of machines for digging pipeline [1. 2. 3], in particular, pipeline, can not meet such requirements as the development of these soils, no doubt, will require increased efforts compression pipeline to avoid thrashing mechanism, however, to increase the force of the compression pipeline is dangerous, as it will disappear guarantee the security of the pipeline, as the contact load on the pipe will exceed the standard.

The task of the claimed invention is to improve the traction performance of the mechanism without increasing the contact stresses on the pipeline, as well as providing multipurpose the particular mechanism by providing the ability to develop in an optimal regime of weak and strong soils, without creating the danger of holding podopechnyh works.

This object is achieved in that in the known mechanism of movement of the machine for digging pipelines containing interconnected identical to the undercarriage with the outer and inner frames and the outer frame are provided with longitudinal guide tracks, and the inner frame has rails running wheels, which are mounted outside the frame rails of the longitudinal tracks, each of the frames supplied tick grippers, which are interconnected by means of hydraulic cylinders in the respective chassis trucks, unlike the prototype, the truck performed with supports for piping installed on internal frames, and tick the hooks on the inner and outer frames each truck interconnected by means of hydraulic cylinders, one of the trolleys are connected with a connecting her trolley through the mounting platform for attachment.

Developed technical solution making it possible to synchronize the work driving trucks and get double traction. Increase traction indicators, for example, two times, does not increase the contact stresses on the pipe twice traction corresponds to twice the number of contact places environmenta what I mechanism on the pipeline, etc.

Place in the mechanism of movement, where should be located one truck, and where two or more, is determined by the task performed by the mechanism of movement. In a machine for digging where you want to improve traction in the desktop mode, additional traction truck is mechanically and hydraulically connected to the cart, providing a working stroke.

Tandem execution of the movement mechanism of the machine for digging pipelines makes the universal, as it can be used to develop strong soils, such as frozen, but also weak soils. Poor soils can be developed with additional transport frame and can work fine without the additional undercarriage. Traction mechanism will be lower, but they are sufficient, as shown by experience in the usage of more than 20 years other machinery machines for digging. Changeover mechanisms with three trucks on two or Vice versa is very simple and not time consuming. Transfer locations of supports in contact with the pipe, with the outer frame on the inside allowed to exclude the contact of the outer frame with the pipeline. External frames perceive the weight load from the mounted equipment and the workload of the resistance of the excavation, so the transfer of supports in contact with the pipe, with the outer frames on the internal frame is iquidity resistance, emerging into the outer frame from the power contact support with the pipe during movement of the mechanism. The power cylinders in this version will be fully involved in the digging of the soil. Frame exterior will travel along the guide wheels internal RAM as the roller is fixed on the pipeline.

All the carriages are identical in the device, the principle of movement, method of control, they are interchangeable.

Figure 1 shows the proposed mechanism of movement of the machine for digging pipelines.

Figure 2 shows the mechanism of movement of the machine for digging pipelines, view A-a in figure 1.

The mechanism of movement of the machine for digging depicted on the pipe 1, is a set of three identical chassis trucks with frames 2, 3, 4 and outer frames 5, 6, 7 internal. Frame 5, 6, 7 provided with internal bearings 8, 9, 10, which is the mechanism of movement of the machine is mounted on the pipe 1. In addition, a frame provided with internal guides driving wheels 11, 12, 13, which serve as supports movement of the outer frames 2, 3, 4. Frames 3, 4 exterior rigidly fixed to the mounting platform 14 for mounted equipment, and the frame 2 by means of a horizontal hinge 15 and the vertical hinge 16 is connected to the frame 3. Horizontal hinge 15 is equipped with a locking device 17. Frame outer 2, 3, snabjeny tick grippers 18, 19, 20, and a frame provided with internal tick grippers 21, 22, 23. Tick the gripper pairs are linked in the frames of the outer and inner rods 24 and 25, 26 and 27, 28 and 29 through the respective connection axis. Thrust 25, 27, 29 of the inner frame 5, 6, 7 are connected with the rods 24, 26, 28 of the outer frames 2, 3, 4 by means of hydraulic cylinders 30, 31, 32. Tick the grippers are connected with frame axes 33, 34, 35, 36, 37, 38, and between each pair of tick seizures associated springs 39, 40, 41, 42, 43, 44.

The mechanism of movement of the machine for digging equipped with a remote control unit 45, which are mounted controls hydrovalves and devices 46 and 47 for cultivation tick grabs to the respective lugs 48, 49, 50, 51, 52, 53 by tensioning the cables 54, 55, 56.

The mechanism of movement of the machine for digging pipeline works as follows.

Starting position - the mechanism with the mounted equipment is installed on the pipe 1 and is fixed tick grippers 18, 21, 19, 22 by means of springs 39, 40, 41, 42. The cables 54 and 55 have no tension. Device 47, the cable 56 is pulled, the cylinder 32 is moved toward the mounting platform 14 and tick grips parted to the stops 52, 53 and in this position is locked. Trolley with frames 4 and 7, when the movement in the operating mode is switched off. Tick the grippers in contact with the pipe does not come. The rotors are bred using GI is rollinger (figure 1 not shown). Management of breeding - mixing rotors is carried out with the remote control 45 secondary lever hydrosaluric.

The first stage of the work.

Enables the drive rotor and hydraulics. Carried the force lowering of the rotors with the simultaneous development of the soil under the pipe. The rotors occupy a specified position under the pipe (see figure 2). The machine is ready to perform basic work - digging pipeline.

The second stage is the working movement of the mechanism to remove soil from under the pipeline. One movement of the left lever of the control valve spool forward (backward) liquid is pumped into the piston cavity of the hydraulic cylinders 30, 31. The rods are put forward, the hydraulic cylinders 30, 31 are beginning to increase in length. Thrust 25, 27, employed at this point in the mode pushers, through the corresponding axis and the upper levers tick grippers 21, 22 rotate on axes 33, 35 lower arms of tick grippers 21, 22, which increase the pressure of the clamps to the pipe. In this case, the inner frame 5, 6 are rigidly fixed on the pipe against axial movement. Simultaneously, synchronously thrust 24, 26 through the corresponding axis and the upper levers tick hooks 18, 19 bred tick grips to the stops 49, 51, overcoming this resistance of the springs 40, 42. Using frames 5, 6 internal as bearings, hydraulic cylinders 30, 31, fulfilling silveiravet stocks, moved the mechanism along the pipe PA stroke of the piston. Frames 2, 3 its outer longitudinal guide tracks to ride on rails running wheels 11, 12, using them as a roller conveyor. One movement of the same lever of the control valve spool back (forward) liquid is fed into the rod cavity of the hydraulic cylinders 30, 31 and the cylinders are shortened in length. When this thrust 24, 26 will operate in the mode pushers and together with the springs 40, 42 tick clamps 18, 19 is rigidly fixed frame 2, 3 exterior to the pipeline. Thrust 25, 27 rotate on axes 33, 35 tick grips 21, 22 to the stops 48, 50, overcoming this resistance of the springs 39, 41. Freed from the commit pipeline 1 of the inner frame 5, 6, without losing contact with the pipe, for guiding longitudinal track frames 2, 3 exterior will move forward on the course of the housings of the cylinders 30, 31, i.e. the stroke of the piston in the cylinder.

Finished walking the course of the movement mechanism of the machine for digging in two cycles inclusion of cylinders:

a) the Working movement of the machine with the digging of the soil under the pipe.

b) Secondary (dummy) movement of the inner frame inside the chassis trucks.

The machine is adopted original position to re-work movement. Movement of the same lever of the control valve spool in the before (ago) mechanism will re-execute the same sequence in all operations and will move through the pipe at a stroke, etc.

For changing the direction of movement of the mechanism is necessary and sufficient device 47 to remove the tension cable 56. Springs 43, 44 will lock the truck with the frames 4, 7 to the pipeline. Device 46 to pull the cables 54, 55 and spread of tick-borne grips 21, 18, 22, 19 to the stops 48, 49, 50, 51. The movement of the lever of the control valve spool right forward (back) to start the movement of the mechanism in the opposite direction. As all truck unit, and all operations engaged in cycles of movement will be carried out in the same sequence. The only difference will be that this movement will be faster than two times the labor movement. This is due to the difference in the number used to move the cylinders.

Thus, it is seen that the mechanism of movement of the machine, which is one of the basic trucks are equipped with an additional one or more driving trucks, and implemented it in tandem execution of simple construction, easily operated, has a technical solution to increase traction performance without increasing contact stresses in the pipe from the machine. This technical solution allows to solve the state problem repair mode more secure in the repair of trunk pipelines and oil product pipelines. Many of these pipelines are operated by the ez repairs for over 40 years, while the rate is 33 years old. You must take this into account aging, and thus lowering the reliability of the pipelines. The opportunity to reduce the contact stresses in the pipe even with some increase in the productivity of the machines for digging - this is a great technical achievement. The possibility of unification of the new mechanism of movement in machines for digging as to develop a rugged soil, and with some simplification of the structure through a simple changeover, the development of weak soils will allow a wide use of the machine during the repair of pipelines.

Sources of information

1. USSR author's certificate No. 480885, IPC F 16 L 1/00, publ. B. I. No. 30, 15.08.75,

2. USSR author's certificate No. 513206, IPC F 16 L 1/00, publ. B. I. No. 17, 5.05.76,

3. RF patent №2084589 C1 IPC E 02 F 5/10; F 16 L 1/00, publ. B. I. No. 20, 20.07.97,

The mechanism of movement of the machine for digging pipelines containing interconnected identical to the undercarriage with the outer and inner frames and the outer frame are provided with longitudinal guide tracks, and the inner frame has rails running wheels, which are mounted outside the frame rails of the longitudinal tracks, each of the frames supplied tick grippers, which are interconnected by means of hydrocylinders respective undercarriage bogies, characterized in that the undercarriage is made with supports for piping installed on internal frames, and tick the hooks on the inner and outer frames each truck are connected by means of hydraulic cylinders, one of the trolleys is rigidly connected with a connecting her trolley through the mounting platform for attachment.



 

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